A question that is burning for me, and I am hoping somebody else has inquired about this as well. For our next flock, we want the lowest lead possible in our eggs. We found the soil and water were very low, and we have no paint chips. We had our eggs checked, and they had a high lead content. So it must have been the feed. How could one make their own feed, and ensure that it has a low lead content for the calcium part?